CN112091527B - High-reliability repair method for short annular metal plate flame tube - Google Patents
High-reliability repair method for short annular metal plate flame tube Download PDFInfo
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- CN112091527B CN112091527B CN202010993381.3A CN202010993381A CN112091527B CN 112091527 B CN112091527 B CN 112091527B CN 202010993381 A CN202010993381 A CN 202010993381A CN 112091527 B CN112091527 B CN 112091527B
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- B23P6/04—Repairing fractures or cracked metal parts or products, e.g. castings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention relates to a high-reliability repair method for a short annular metal plate flame tube, which provides four processes aiming at faults at different positions respectively, and comprises the steps of repairing a two-section lap joint ablation chipping-off part of an inner wall by a welding and block supplementing method, deeply repairing an overproof crack and chipping-off part of an outer wall by a method for replacing the outer wall, repairing a crack of an inner wall positioning ring by a method for replacing the inner wall for the second time, and replacing a swirler by a non-destructive reloading method. The invention can reduce the rejection rate of the flame tube and lower the overhaul cost.
Description
Technical Field
The invention belongs to the technical field of aeroengine manufacturing, and particularly relates to a high-reliability repair method for a short annular metal plate flame tube.
Background
The flame tube is a core part of the engine, is a part for mixing and burning atomized fuel oil and air to generate high-temperature and high-pressure gas to push the turbine to rotate to do work, and is a quick-wear part on the engine because the flame tube bears high-temperature flame erosion corrosion and frequent cold and hot circulation and has extremely poor working conditions. In order to ensure the safety of the flight, the engine needs to be disassembled and overhauled after each period, wherein a wearing part flame tube is a key inspection and repair part. The flame tube often suffers from the following failures: cracks of a head washboard groove, cracks of a hole edge, size over-tolerance of an air film gap, diameter and jumping over-tolerance, ablation and block falling of a two-section lap joint of an inner wall, severe warping of an outer wall, secondary cracks of an inner wall positioning ring and cracks of a swirler. The defects of cracks of the head part rubbing plate groove, cracks of the hole edge, size over-difference of air film gap, diameter and jumping over-difference can be repaired by adopting a repairing method similar to other machine types. But the two-section lap joint of the inner wall is ablated and broken, the outer wall is seriously warped, and the secondary crack of the positioning ring of the inner wall can not be repaired, and if the secondary crack occurs at present, the whole flame tube is scrapped; the vortex device is replaced by a head destructive method after the crack. Thus, the rejection rate of the flame tube is high, and the overhaul efficiency and the overhaul cost are seriously influenced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a high-reliability repair method for a short annular metal plate flame tube, and provides a repair method for a secondary crack of an inner wall positioning ring and a nondestructive reinstallation method for a flame tube, wherein the block is ablated and dropped at a two-section lap joint of the inner wall of the flame tube, the outer wall of the flame tube is seriously warped, and the inner wall positioning ring is damaged, so that the rejection rate of the flame tube is reduced.
A high-reliability repair method for a short annular metal plate flame tube,
(1) the method for repairing the two-section lap joint of the inner wall by welding and repairing the broken block comprises the following steps:
the method comprises the following steps: polishing the ablation block, carefully polishing cracks around the ablation block till no slag is left;
step two: protecting the air film gap by adopting a copper gasket;
step three: processing a patch according to the position and area of the patch falling position to be repaired, and performing repair welding on the polished position;
step IV: correcting the air film gap, polishing and repairing the welding line to enable the welding line to be flush with the part base body, and meeting the use requirement;
(2) the method for deeply repairing the out-of-limit cracks and the falling blocks of the outer wall by replacing part of the outer wall specifically comprises the following steps:
the method comprises the following steps: cutting off the outer wall of the serious crack area on the outer wall in a whole ring according to the part of the outer wall needing to be replaced;
step two: polishing the cut part, and measuring the thickness after polishing;
step three: processing the new outer wall of the ring segment, and performing positioning welding on the new outer wall and the head of the ring segment: measuring the position degree and the size by taking the outlet of the inner wall of the flame tube as an axial reference and a radial reference, and welding the new outer wall of the ring section to the flame tube after the use requirement is met until the use requirement is met;
(3) the method for repairing the cracks of the inner wall positioning ring secondarily by the inner wall replacement method comprises the following steps:
the method comprises the following steps: cutting off the inner wall of the positioning ring crack needing secondary repair for the second time, and manufacturing a new inner wall;
step two: polishing and repairing a to-be-welded part between the inner wall and the head part to ensure that the wall thickness is not less than 80% of the original wall thickness;
step three: taking the outlet of the outer wall as a radial and axial positioning reference, and adopting a fast frequency argon arc welding technology to assemble, position and weld the new inner wall and the flame tube head together;
step IV: and (4) carrying out combined turning on the outlet of the newly replaced inner wall to ensure the requirement of the design size precision.
(4) The method for replacing the vortex device by the nondestructive reloading method comprises the following steps:
the method comprises the following steps: reversely turning up the flanged edge of the head of the swirler by adopting a prying shovel with a sharp edge, and taking out the swirler needing to be replaced;
step two: replacing a new swirler, and then covering and pressing the swirler again by adopting the prying shovel in the step I;
step three: and performing fluorescence inspection on the flanging position to ensure that the secondary flanging position has no cracks.
In the welding block supplementing method, a pen type pneumatic drill is used for clamping a conical alloy rotary file in the polishing of the ablation block falling position.
And the welding patch method adopts argon arc welding patch welding in the step III.
And repairing the thickness through melting in the second inner wall replacing method.
The invention has the beneficial effects that: the invention provides a high-reliability repair method for a short annular metal plate flame tube, wherein four processes are respectively provided for faults at different positions, ablation chipping of a two-section lap joint of an inner wall is repaired by a welding and block repairing method, overproof cracks and chipping of the outer wall are repaired deeply by replacing part of the outer wall, cracks of an inner wall positioning ring are repaired by a secondary inner wall replacing method, and a swirler is replaced by a non-destructive reloading method.
Drawings
FIG. 1 is a schematic view of a two-segment lap joint of the inner wall of a flame tube;
FIG. 2 is a schematic diagram of an outer wall of a flame tube at an overproof crack and a chipping position;
FIG. 3 is a schematic view of a swirler at a head flange;
wherein the content of the first and second substances,
the vortex generator comprises a first section of inner wall, a second section of inner wall, a section of outer wall, which needs to be replaced, a vortex generator 3, and a head flanging section of a vortex generator 4.
Detailed Description
For better understanding of the present invention, the technical solutions and effects of the present invention will be described in detail by the following embodiments with reference to the accompanying drawings.
Based on the statistics of the structural characteristics, the use conditions and the fault conditions of the short annular metal plate flame tube, the invention provides a high-reliability repair method for the short annular metal plate flame tube, which comprises the following steps:
(1) repairing the ablation block at the two-section lap joint of the inner wall by a welding block-supplementing method:
as shown in FIG. 1, after the flame tube is used, the 1 crack and ablation chipping at the first and second sections of the lap joint of the inner wall are common faults, and as the service time is prolonged again, the ablation condition at the part can be more serious, the occurrence frequency of the fault is increased, and the crack can be developed into the ablation chipping. The method for repairing the ablation chipping of the first and second sections of the lap joint of the inner wall is a welding and block supplementing method, and specifically comprises the following steps:
the method comprises the following steps that firstly, a pen-type pneumatic drill is used for clamping a conical alloy rotary file to polish the ablation block, cracks around the ablation block are carefully polished to be clean, and the abrasion is carried out until no slag is left;
step two: protecting the air film gap by adopting a copper gasket;
step three: processing a patch according to the position and area of the patch falling position to be repaired, and performing repair welding on the polished part by argon arc welding;
step IV: correcting the gas film gap, polishing and repairing a welding line to enable the welding line to be flush with a part base body, and meeting the use requirement;
(2) and (3) replacing part of the outer wall to deeply repair the overproof cracks and the falling blocks of the outer wall:
as shown in fig. 2, as the service life of the flame tube increases, various fault defects begin to appear on the outer wall of the flame tube, such as the defects that the number and the size of large-hole edge cracks exceed the standard, and the large-hole edge ablation buckling deformation seriously exceeds the standard, and aiming at the defects, the method for replacing part of the outer wall deeply repairs the outer wall exceeding-standard cracks and chipping specifically comprises the following steps:
the method comprises the following steps: cutting off the outer wall of the serious crack area on the outer wall in a whole ring according to the part 2 of the outer wall needing to be replaced;
step two: polishing the cut part, and measuring the thickness after polishing;
step three: processing the new outer wall of the ring segment, and performing positioning welding on the new outer wall and the head of the ring segment: measuring the position degree and the size by taking the outlet of the inner wall of the flame tube as an axial reference and a radial reference, and welding the new outer wall of the ring section to the flame tube after the use requirement is met until the use requirement is met;
(3) and (3) repairing the cracks of the inner wall positioning ring for the second time by a secondary inner wall replacement method:
the inner wall positioning ring has cracks after the flame tube is used, and can only be maintained by a method of replacing the inner wall, but along with the lengthening of the service time of the flame tube again, the ablation condition of the part can be more serious, the frequency of the occurrence of the faults is increased, so that the inner wall is replaced for the second time, and the method for repairing the inner wall positioning ring by replacing the inner wall for the second time specifically comprises the following steps:
the method comprises the following steps: secondarily cutting off the inner wall of the positioning ring crack needing to be secondarily repaired, and manufacturing a new inner wall;
step two: polishing and repairing the to-be-welded part between the inner wall and the head part, and repairing the thickness by melting to ensure that the wall thickness is not less than 80% of the original wall thickness, which is the key point in the method;
step three: and the outlet of the outer wall is used as a radial and axial positioning reference, and a new inner wall and the head of the flame tube are assembled, positioned and welded together by adopting a fast frequency argon arc welding technology so as to reduce welding deformation.
Step IV: in order to meet the final assembly requirement of the parts, the outlet of the newly replaced inner wall is subjected to combined turning so as to ensure the requirement of the design size precision.
The method can effectively realize secondary replacement of the inner wall, avoid scrapping of the flame tube, save the repair cost and shorten the repair period.
(4) Non-destructive recharging method for replacing vortex device 3
In the process of replacing the inner wall, the swirler 3 needs to be detached, the swirler 3 is assembled again after the inner wall is replaced, in the process of assembling the swirler 3 again, the flanging needs to be ground off, the swirler 3 is assembled on the head of the flame tube by using an intermittent welding method, and heat treatment needs to be carried out after welding. The method has influence on the state of the part, and has low efficiency and high cost, thus being not beneficial to large-scale maintenance. The non-destructive reloading method for replacing the swirler 3 specifically comprises the following steps:
the method comprises the following steps: as shown in fig. 3, a head flanging part 4 of the vortex device is turned up reversely by a prying shovel with a sharp edge, and the vortex device 3 needing to be replaced is taken out;
step two: replacing a new swirler 3, and then covering and pressing the swirler 3 again by adopting the prying shovel in the step I;
step three: and performing fluorescence inspection on the flanging position to ensure that the secondary flanging position has no cracks.
Claims (3)
1. A high-reliability repair method for a short annular metal plate flame tube is characterized by comprising the following steps:
(1) the method for repairing the ablation chipping of the first and second sections of the lap joint of the inner wall by the welding and block supplementing method specifically comprises the following steps:
the method comprises the following steps: polishing the ablation block, carefully polishing cracks around the ablation block till no slag is left;
step two: a copper gasket is adopted to protect the air film gap;
step three: processing a patch according to the position and area of the patch falling position to be repaired, and performing repair welding on the polished position;
step IV: correcting the gas film gap, polishing and repairing a welding line to enable the welding line to be flush with a part base body, and meeting the use requirement;
(2) the method for deeply repairing the out-of-limit cracks and the falling blocks of the outer wall by replacing part of the outer wall specifically comprises the following steps:
the method comprises the following steps: cutting off the outer wall of the serious crack area on the outer wall in a whole ring according to the part of the outer wall needing to be replaced;
step two: polishing the cut part, and measuring the thickness after polishing;
step three: processing the new outer wall of the ring segment, and performing positioning welding on the new outer wall and the head of the ring segment: measuring the position degree and the size by taking the outlet of the inner wall of the flame tube as an axial reference and a radial reference, and welding the new outer wall of the ring section to the flame tube after the use requirement is met until the use requirement is met;
(3) the method for repairing the cracks of the inner wall positioning ring secondarily by the inner wall replacement method comprises the following steps:
the method comprises the following steps: cutting off the inner wall of the positioning ring crack needing secondary repair for the second time, and manufacturing a new inner wall;
step two: polishing and repairing a to-be-welded part between the inner wall and the head part to ensure that the wall thickness is not less than 80% of the original wall thickness;
step three: taking an outlet of the outer wall as a radial and axial positioning reference, and assembling, positioning and welding the new inner wall and the flame tube head together by adopting a fast frequency argon arc welding technology;
step IV: performing combined turning on an outlet of the newly replaced inner wall to ensure the requirement of design size precision;
(4) the method for replacing the vortex device by the nondestructive reloading method comprises the following steps:
the method comprises the following steps: reversely turning up the flanged edge of the head of the swirler by adopting a prying shovel with a sharp edge, and taking out the swirler needing to be replaced;
step two: replacing a new swirler, and then covering and pressing the swirler again by adopting the prying shovel in the step I;
step three: performing fluorescence inspection on the flanging position to ensure that no crack exists at the secondary flanging position;
and secondly, repairing the thickness by welding in the step II of the secondary inner wall replacement method.
2. The high reliability repair method for the short annular sheet metal flame tube according to claim 1, characterized in that: in the welding block supplementing method, a pen type pneumatic drill is used for clamping a conical alloy rotary file in the polishing of the ablation block falling position.
3. The high reliability repair method for the short annular sheet metal flame tube according to claim 1, characterized in that: and in the third step of the welding patch method, argon arc welding patch welding is adopted.
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| CN202010993381.3A CN112091527B (en) | 2020-09-21 | 2020-09-21 | High-reliability repair method for short annular metal plate flame tube |
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| CN202010993381.3A CN112091527B (en) | 2020-09-21 | 2020-09-21 | High-reliability repair method for short annular metal plate flame tube |
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| CN113967821A (en) * | 2021-11-23 | 2022-01-25 | 华瑞（江苏）燃机服务有限公司 | Method for repairing overtemperature damage of composite cooling structure flame tube |
| CN115008123A (en) * | 2022-07-26 | 2022-09-06 | 邯郸市永年区海翔机械厂 | Engine flame tube main body broken block repairing method |
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| US4967458A (en) * | 1987-12-31 | 1990-11-06 | Automotive Aftermarket Development Corporation | Process for renewing cylinder heads |
| CN1235889A (en) * | 1998-05-19 | 1999-11-24 | 本钢第二炼钢厂劳动服务公司 | Repairing method for steel slag tank |
| CN101704154B (en) * | 2009-11-18 | 2011-11-16 | 沈阳黎明航空发动机(集团)有限责任公司 | Patch welding repair method for machining liner of nickle-based wrought superalloy overhaul machine |
| CN101704165B (en) * | 2009-11-18 | 2011-12-14 | 沈阳黎明航空发动机(集团)有限责任公司 | Laser welding repair method for machining liner of nickle-base wrought superalloy annular machine |
| CN102430889B (en) * | 2011-09-09 | 2013-06-26 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for repairing crack and chipping of shunt ring of case |
| CN102778169A (en) * | 2012-08-17 | 2012-11-14 | 湖南合磷化工有限公司 | Reparation method of converging-diverging pipe heat exchanger |
| CN106988291B (en) * | 2017-03-29 | 2019-02-01 | 中国海洋石油集团有限公司 | The method that jacket is repaired at sea |
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